Mold for casting compound bars



W. PAUL av T. J. WOOD.

MOLD FOR CASTING COMPOUND BARS. No. 309,737. Patented Dec. 23, 1884'.

(No Model.) 2 Sheets-Sheet 1.

(No Model.) 2 Sheets-Sheet 2.

I W. PAUL &: T. J. WOOD. V MOLD FOR GASTING'GOMPOUND BARS. No. 309,737. Patented Dec. 23,1884;

Uivrricn Srares PATENT Crates.

\VILLIAM PAUL AND THOMAS J. IVOOD, OF ANSONIA, ASSIGNORS OF ONE- THIRD TO FELIX CHILLING-IVORTH, OF NEIV HAVEN, CONNECTICUT.

MOLD FOR CASTING COMPOUND BARS.

SPECIFICATION forming part of Letters Patent No. 309,737, dated December 23, 1884.

Application filed November 7, 1883.

(No model.)

To aZZ whom, it may concern.-

Be it known that we, WM. PAUL and THOS.

. J. XVooD, of Ansonia, in the county of New Haven, and in the State of Connecticut, have invented certain new and useful Improvements in Molds for Casting Compound Bars; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in

IO which Figure 1 shows a perspective view of our improved mold with the iron or steel core in place; Fig. 2, a view in elevation of the two halves of the mold; Fig. 3, a detail of a holding and centering device for the upper end of the core adapted for use with our mold, and Fig. 4 a detail view showing a modified form of such device and of the means of centering the lower end of the core.

The object of our invention is to provide an improved mold for use in casting'a copper coating or envelope around a steel or iron core to form a compound bar or rod suitable for being drawn down to form a wire, consisting of a steel or iron core surrounded by a con tinuous and uniform envelope of copper; and

to this end it consists in the construction, ar-

rangement, and combination of parts, as here inafter described,and more specifically pointed out in the claims.

In the drawings, A designates the mold, which is formed in two halves, B and C, being divided longitudinally. The half or section B is provided at its upper end with a gate,

3 5 D, of ordinary form. The upper end of each half is formed with a deep semi-annular groove, E, which, when the halves are placed together, forms an annular canal, as shown in Fig. 1, into which the gate D is adapted to guide the 0 molten metal. Through the inner wall, F, of this groove are out notches, slots, or openings f f, extending from the upper edge of the wall downward. Said notches or openings do not extend down to the plane of the bottom of the 4 5 canal or groove E;.but their lower ends are a sufficient distance above it to insure that the molten metal as it runs in at the gate D will flow entirely around in the canal before it rises high enough therein to run into the mold 5o proper through said openings.

Attached to the side of the mold section or half C, at or near its upper end, is a bracket,

G, which is bentinward over the axial center of the bore of the mold. The horizontal arm 9 of this bracket is provided with an opening, H, adapted to receive and hold the upper end of the core I, which is to be inserted in the mold before the molten copper is cast therein. The bottom or lower end of the bore of the mold is, as shown, made tapering, so as to be just large enough at its extreme end to receive and hold the lower end of the rod or bar forming core I, which will thereby be properly centered. The opening H in arm 9 is so situated as to properly center the upper end of the core, and is of such a size as to hold it steadily in place in the axis of the bore, while allowing it free longitudinal play, as the heat from the molten metal cast around it causes the core to lengthen. The outer wall, F, of the annular groove E is, as shown, to be higher than the inner one, F.

In Fig. 3 is shown another form of holding and centering device for the upper end of the core. The arm 5 of the bracket G is, as described above, provided with an opening, H, over the axis of the'mold-bore. On the upper face of the arm, and with its central passage forming a continuation of the opening H, is fixed the sleeve H. This sleeve can of course be made in one piece with the arm, or separately, and then fastened in place in any desired way. Through the passage or open ing through the arm and sleeve passes the shank K,which fits said passage closely enough to be steadied and properly guided therein in its up and down movements. The upper end of this shank is provided with a suitable handpieee or head, L, and its lower end with a head,

M, which below is concaved conically, so that the apex of the cone-shaped cavity will be over the axis of the bore of the mold. A coiled spring, U, surrounds the shank between the lower face of the bracket-arm and the head M, and serves to keep the centering and holding head forced downward to press with a yielding pressure upon the top of the core I,

so as to hold and center the same but to allow for the necessary expansion of said core whenthe molten metal is poured around it. This male center, 0, preferably on the end of a one material.

device not only allows for such expansion of the rod forming the core, but also of the use of rods of various lengths.

In Fig. awe show a modified form of centering and holding device which diflers from the one just described, in that a male center, m, is used whose apex or point enters or engages a female center cut in the end of the rod. With this form of device we prefer to use, instead of the female centering device for the lower end of the bar already described, a

screw, P, projecting up through the bottom of the mold into the bore thereof, as shown. The point or apex of this center enters the female center cut in the lower end of the rod. The molds we prefer to make of iron; but we do not desire to limit ourselves to the use of any The peculiar form of mold and centering and holding devices described above are ob viously adapted for use where a core of any metal is to have cast around it an envelope or covering.

Instead of the open-ended slots for admitting a series of streams of the molten metal into the mold on opposite sides of the core, a number of holes can be provided extending downward and inward toward the core and adapted to deliver the several streams of metal flowing down through and issuing from them directly against the core.

\Vith the mold and holding and centering devices constructed and operating as described above, the steel or iron rod designed to form the core of the compound steel and copper bar is held securely in place in the axial center of the mold, and as several streams of molten metal pour into the mold on opposite sides of the core at once, said core is not caused to buckle or bend out of the axial line of the mold by the unequal heating of its opposite sides, as is the case where the metal is allowed to flow in from the gate in one stream, which must strike one side of the core before it does the other. I

As by the holding and centering devices shown and described the core is allowed to lengthen freely under the influence of the heat from the molten metal, it will not be caused to bend, as would be the case if such longitudinal expansion were not allowed for.

\Ve do not herein claim the process of casting copper around an iron or steel core, in the carrying out of which the molten metal as it flows into the mold is divided into two or more separate streams, which strike and flow down the core on opposite sides thereof at the same time, as such process we intend to cover in another application filed by us of even date with this.

Having fully described our invention, what we claim is- 1. A mold provided with a holder adapted to hold a core axially within the mold while allowing it to expand and contract freely, and with means, substantially as described, adapted to cause the molten metal as it first enters the mold to strike against the core in several streams simultaneously on opposite sides thereof, substantially as and for the purpose described.

2. A mold formed at its upper end with an annular channel or groove around its bore, into which molten metal flows from the gate, and with openings extending through the inner wall of such channel into the bore, and arranged diametrically opposite each other, substantially as and for the purpose set forth.

3. A11 upright mold provided at its upper end with a suitable gate, and formed with an annular channel in the face of that end and extending around the mold-bore, into which channel molten metal flows from the gate, and

with passages through the inner wall of the channel above the plane of the bottom of said channel and opening into the mold-bore on opposite sides of the same, substantially as and for the purpose set forth.

4. In combination with an upright mold formed at its upper end with a channel extending around its bore, and with passages through the inner wall of the channel on a plane above the bottom of the latter and 0pening into the mold-bore on opposite sides there of, means for holding a bar or core centrally in said mold-bore, substantially as and for the purpose set forth.

In testimony that we claim the foregoing we have hereunto set our hands this 5th day of November, 1888.

\VILLIAM PAUL. THOMAS J. \VOOD. W'itnesses:

J AS. B. KEnNn, DAUNT E. McMAHoN. 

